void add_to (EC_GROUP const* group,
ec_point const& a,
ec_point& b,
bn_ctx& ctx)
{
if (!EC_POINT_add (group, b.get(), a.get(), b.get(), ctx.get()))
{
throw std::runtime_error ("EC_POINT_add() failed");
}
}
void serialize_ec_point (ec_point const& point, std::uint8_t* ptr)
{
ec_key key = ec_key_new_secp256k1_compressed();
if (EC_KEY_set_public_key((EC_KEY*) key.get(), point.get()) <= 0)
{
throw std::runtime_error ("EC_KEY_set_public_key() failed");
}
int const size = i2o_ECPublicKey ((EC_KEY*) key.get(), &ptr);
assert (size <= 33);
(void) size;
}